Credit: NILERED/SCIENCE PHOTO LIBRARY

Caption: Sodium polyacrylate absorbing water. Water being added to a small quantity of sodium polyacrylate in a glass, causing it to expand many times in volume. Sodium polyacrylate is a polymer. It is a sodium salt of polyacrylic acid, and expands as it absorbs hundreds of times its own weight in water due to osmosis. The polymer network acts like a semi-permeable membrane, with water flowing into the ion-rich polymer due to osmotic pressure. Despite the volume of water added here, the resulting 'snow' is virtually dry as the water has been absorbed. Sodium polyacrylate is also referred to as 'instant snow' and 'waterlock'. Applications for this polymer include uses in detergents, thickening agents, artificial snow, and absorbing pads in products such as nappies.

Release details: Model release not required. Property release not required.

Keywords: absorbent, absorbing, absorption, acrylate polymer, chemical, chemistry, clip, demonstration, educational, expanding, expansion, experiment, film, footage, instant snow, lab, laboratory, motion, one person, osmosis, osmotic, osmotic pressure, people, person, polymer, reacting, reaction, school science, sodium polyacrylate, water uptake, waterlock

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Sodium polyacrylate absorbing water

K007/2036 Rights Managed

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Duration: 00:00:30.21

Frame size: 1920x1080

Frame rate: 29.97

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Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 754.4M

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